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On the independence of hydrogen production from methanogenic suppressor in olive mill wastewater

Author(s): Gonçalves, Marta R. ; Costa, J. C. ; Pereira, M. A. ; Abreu, A. A. ; Alves, M. M.

Date: 2014

Persistent ID:

Origin: RepositóriUM - Universidade do Minho

Project/scholarship: info:eu-repo/grantAgreement/FCT/5876-PPCDTI/126270/PT ;

Subject(s): Biohydrogen; Darkfermentation; Olive mill wastewater; Biomethane; Homoacetogenesis; Olive oil mill effluent; Methanogenic suppressor; Anaerobic digestion; Science & Technology; Science & Technology; Science & Technology


Anaerobic degradation of olive mill wastewater (OMW) at concentrations ranging from 2 to 100 g/L of chemical oxygen demand (COD) was assessed in batch assays. Methane was the main final product obtained for the lower concentrations tested. For 25 g COD/L, H2 was temporarily produced, albeit H2 depletion occurred, likely due to homoacetogenesis, since acetate was formed concomitantly. Hydrogen was produced and accumulated permanently in the assays containing 50 g COD/L of OMW. Methanogenesis and homoacetogenesis were naturally inhibited, suggesting that hydrogen recovery from OMW can be performed without the addition of methanogenic suppressors such as 2-bromoethanosulfonate. This fact opens new perspectives for the utilization of high OMW concentrations in a two-stage valorisation process combining biohydrogen and biomethane production.

Document Type Journal article
Language English
Contributor(s) Gonçalves, Marta R.; Costa, J. C.; Pereira, M. A.; Abreu, A. A.; Alves, M. M.
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